Three to four weeksThe 26-year-old central defender lasted only seven minutes of the goalless draw at the Arsenal Stadium before being replaced by Philippe Senderos, with Arsène Wenger later explaining the extent of the injury. "Touré has a calf problem and will be out for three to four weeks at least," said the Arsenal manager, who also had to substitute Emmanuel Eboué with Theo Walcott late on. The second leg is at San Siro on 4 March.

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